vowing to raise taxes on the wealthy. another republican saxby chambliss of georgia, in a recent interview, says he's no longer bound by a pledge not to raise taxes. >> the pledge i signed 20 years ago was valid then. it's valid now but times have changed significantly, and i care more about this country than i do about a 20-year-old pledge. >> reporter: but raising taxes is only one-half of a deficit deal. republicans want democrats to raise the eligibility age for medicare. >> i want entitlement reforms. republicans put revenue on the table, democrats always promise to cut spending. i'm looking for more revenue for entitlement reform before the end of the year. >> reporter: so far democrats sound lex flexible. >> we've got to make sure there is seamless coverage of afordable health coverage for every american. my concern about raising the retirement age gaps in coverage or coverage that's way too expensive for seniors to purchase. >> reporter: there are many potential cliffs but higher taxes for structural changes for m